The product is a lot of 10 Micron 4GB 2Rx8 PC3-12800E ECC server memory modules, totaling 40GB of memory capacity. These DDR3 SDRAM modules have a form factor of UDIMM and are designed for servers with a bus speed of PC3-12800E (DDR3-1600). The modules come with a manufacturer warranty of 1 month and are made in the United States. The memory modules feature ECC memory, which is error-correcting code memory designed to detect and correct errors during data transmission. This product is ideal for enhancing the performance and reliability of server systems.